Non Print Contours

gwg.org

Non Print Contours

PDF for Packaging

(and Labels and Sign and Display and…)

Jan 2013

Lieven Plettinck

1


Why Standardize

Interoperability

• between sites

• between companies

Reduce Errors

Enable Automation

• between systems from different vendors

Converting

Graphics

Design

Production

Art

Prepress

Converting

Structural

Design

PDF production master

for printing and finishing

2


Packaging related

Standardization efforts in GWG




Packaging Specification

Non Print Contours

Spot Color Specification

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Non Print Contours


Non Print Contours

• PDF path and text objects

• Not used to define final printing separations

• Usually printed on proofs

• Common practice in packaging, labels, sign and display

(technical separations)

• ..not exclusive to packaging

5


Types of non Print Contours

Cut Contour Crease Contour

Structural Data

• Sometimes called CAD, die lines,

etc…

• Describe how the 3D packaging

element will be produced from a flat

substrate

• Describe production steps in

finishing (cut, fold, glue, emboss…)

• Used for folding carton, corrugated

boxes, displays, label, flexible pack,…

• Generated in specialized apps,

imported in the graphics app

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Types of non Print Contours

Braille

• Applied during finishing (die cutter

or folder gluer)

• Ink jet

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Types of non Print Contours

Legend

• Informational panels

• design identification

• customer info

• technical details…

• Positioned outside the die line

8


Types of non Print Contours

Dimensions

• A collection of indications (arrows,

numbers and units) indicating sizes

of items in the design.

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Types of non Print Contours

Positions

• Indications of intended

or allowed positions for

text, barcodes,

holograms, etc..

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Why store non print contours in

PDF

• Graphic Design

•Correct placement of graphic elements in relation to

structure (die)

• QC and approval

• Usage of the correct die

• Check correct placement of graphics in relation to die

Non visually impaired QC people check braille

• Legends and dimensions give extra context

11


Why store non print contours in

PDF

• Layout and tool manufacturing

• Outer contour of 1–up is used for layout of the printing

sheet or web repeat (step and repeat, nesting)

12


Why store non print contours in

PDF

• PDF for driving digital finishing

• Cutting tables (sample making and short-run)

• Digital laser cutters

• Digital FC finishing

13


Why store non print contours in

PDF

• Virtual Prototypes

From this…

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Why store non print contours in

PDF

• Virtual Prototypes

From …to this…

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How are non print contours stored

in PDF

Metadata in OCG dictionaries.

Standardized vocabulary

Set of rules

for coloring

non print

contours.

Structured set of layers

(OCGs)

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Spot Color

Specification

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What is the problem


The output intent in a PDF defines process color (deviceCMYK)

colorimetrically using an ICC profile. (required in PDF/X-4)

ICC Profile


The alternate colorspace of a spot color (Separation Colorspace) can define

the Lab value (or the CMYK equivalent) of the 100% solid.

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So what is the problem

Spot 1

100% 50%

100%

No tint information

No transparency information

50% Spot 1

+ 50% Spot 2

Spot 1+ Spot 2

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So what is the problem

Spot 1

D50 Illumination

Spot 1

Spectral Reflectance

Spot 1

F2 Illumination

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Spectral Ink Data embedded in PDF


1 CxF blob per spot color


CxF is a XML format defined by XRite

– It was submitted by XRite to ISO TC130 for standardization (ISO 17972-1)


CxF for a spot color contains spectral reflectance of number of patches of

the spot color.

- Tint ramp on clear substrate and black

- This is being standardized by ISO TC130 (ISO 17972-4)

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What’s next




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